Knife structure



Oct. 17, 1939.

A. wYPER'. sR

KNIFE STRUCTURE Filed Feb. 28, 1939 6772 drew Myer, Sr.

Patented Oct. 17, 1939 UNTED STATES PATENT OFFCE 2 Claims.

This invention relates to a knife structure, and it is primarily an object of the invention to provide a structure of this kind embodying a holder for use in connection with a conventional type of 5 safety razor blade, said holder being so constructed and arranged to provide means to permit the blade to be held thereby in several different positions in accordance with the usage it is desired the knife structure be put.

It is also an object of the invention to provide a knife structure having associated therewith a member for coaction with the blade to facilitate the use of the structure for cutting and ripping seams; for cutting cardboard and paper; as a pencil Sharpener, and kindred uses.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved knife structure whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will here- `inafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying draw- Y ing, wherein- Figure 1 is a view partly in section and partly in elevation of a knife structure embodying my invention and with the blade in what may be termed a longitudinal position with respect to the handle;

Figure 2 is a longitudinal sectional view taken substantially on the line 2-2 of Figure 1 With certain of the parts in elevation;

Figure 3 is a sectional view taken substantially on the line 3-3 of Figure 1;

Figure 4 is a sectional view taken substantially on the line 4--4 of Figure l;

Figure 5 is a view in elevation of the knife structure in accordance with a further embodiment of my invention;

Figure 6 is a sectional View taken substantially on the line 6 5 of Figure 5;

Figure 7 is an elevational view of my knife structure with the blade in a transverse position.

As disclosed in the accompanying drawing, my

improved knife structure comprises an elongated tubular handle member H of a flattened form and having its opposite ends closed by the plates I and 2. As herein disclosed, these plates I and 2 are integrally formed with one of the flat walls of the member H and are bent over into desired closing position. The plate I is provided therealong from end to end with a groove or channel 3 while both of the plates I and 2 at substantially the longitudinal centers thereof are provided with the openings 4 through which are freely directed an 5 elongated bar'or rod 5.

This bar 5 is of a length materially greater than the length of the handle member H. One end portion of this bar 5 is threaded, as at 6, while the opposite or remaining portion of the bar 5 is 10 formed to provide a flat face 'i extending therealong. The rod 5 at the outer end of the at face 'I is formed to provide an inwardly facing hook member 8 herein disclosed as of a width less than the width of the flattened face 'I and positioned 15 at substantially the transverse center thereof. The applied rod extends beyond the opposite ends of the handle member H and engaging the threaded portion B thereof is a Wing nut 9 for coaction with the adjacent end plate 2 of the 20 handle member H for a purpose to be hereinafter referred to.

The knife blade B is of a conventional type having the longitudinal marginal portion thereof remote from the cutting edge a' reinforced by the 25 head strip I0. This head strip I0 is U-shaped in cross section and straddles the blade B and results in an inwardly facing shoulder b at opposite sides of the blade B. The blade B at each end is provided with a notch or recess I2 and at substan- 30 tially its longitudinal center is provided with a transversely disposed slot I4.

When it is desired to use the blade B for peeling, slicing and kindred cutting operations, the blade B is disposed lengthwise upon the face 'l of 35 the rod 5 with the hook 8 engaged within the notch I2 at the outer end of such blade B. The nut 9 is then rotated in a direction to throw the inner end of the blade B tightly within the groove or channel 3. 40

With the blade B in this assembly and it is desired to use the knife structure for cutting and ripping seams; for cutting cardboard and paper, and kindred purposes, the member M is used. 'I'his member M is of a length substan- 45 tially coextensive with the length of the blade B. This member M is substantially U-shaped in cross section with one side plate I5 of a width greater than the second side plate I6. The member M straddles the cutting side portion 50 of the blade B and the wider plate I5 along its free marginal portion and outwardly of the second plate I6 is formed to provide an inwardly facing bead I1 to straddle the portion of the rod 5 extending along the blade B. This 55 bead II is also so constructed as to provide an extending flange I8 to engage within the space between the outer portion of the rod 5 and the adjacent shoulder b. The inner edge of the side plate I6 closely approaches the bill of the inwardly facing hook member 8.

It is believed to be obvious that the member M can only be applied or removed with respect to the blade B upon movement in a direction lengthwise of the rod 5.

The outer corner of the member M is cut away on a diagonal line, as at I9, to permit a corner portion of the blade B to be exposed whereby the use of the knife structure in ripping seams or the like is materially facilitated. The outer central portion of the member M is recessed or notched, as at 20, to expose an intermediate portion of the knife edge of the blade B to facilitate the use of the knife structure in sharpening pencils.

When itis desiredA to., use the knife structurel for scraping or cutting paint, stickersor the like from a smooth surface, or for cleaning frost and ice from windshields and kindred work, the blade B is disposedin a direction transverse to the longitudinal axis of the handle member M with the head strip I] seated in the groove or channel. 3 of the handle member H and the hook member 8 engaged through the slot I4. By proper tightening of the rod 5 under the action of the nut 9 the blade B will be effectively heldy in position.

From the foregoing description it is thought to be obvious that a knife structure constructed in accordance with my invention is particularly `well adapted for use by,v reason of the convenience and facility with which it may be assembled and operated, and it will also be obvious.

that my invention is susceptible of some change and modication without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting my-. self to the precise arrangement and formation of the several parts herein shown in carryingout my invention in practice except as hereinafter claimed.

I claim:

1. A knife structure comprising an elongated tubular handle member having its ends closed, one closed end being provided with a channel therealong, both of said closed ends at substantially the transverse center of the handle member being provided with openings, an elongated rod insertible through the handle member and the openings in the closed ends thereof, said elongated rod being of a length materially in excess of the length of the handle member, the extremity of the elongated'rod extending beyond the closed end of the handle member provided with the groove being provided With an inwardly facing hook member, the portion of the elongated rod adjacent to the hook member being provided with a flat face, the opposite end portion of the elongated rod being threaded, a nut engaged with said threaded portion of the elongated rod and coacting with the adjacent end of the handle member, an elongated cutting blade having notches inV its opposite end portions andan opening initsv centralportion, the

hook member being selectively engaged in, one.J

of the notches when an end portion of the blade is engaged within thevggroovevand said hookmem ber engaging the central openingwhen alongitudnal margin ofv the` blade is; engaged within the groove` l 2,. A knife structure comprising a, handle member, a clampingrrod carried by andextending beyond Said mlmber, al blade` held 'to1 the handle member by the rod and disposed along the extended portion of the rod, a longitudinalu margin of the blade being formed to provide a cuttingA edge, a member substantially` U-shaped in crossl section with oneside plateV of greater Width than the other, the wider platel having its free longitudinal marginal portion provided with a bead, to receive the extended portion of the rod as, said Ui-shaped member is placed upon the blade, the Outer corner ofv the Ll-shaped member being cut away on a diagonalline., 

